Mueller's team has begun to question witnesses about
some of Kushner's conversations and meetings with foreign
leaders during the transition.

Investigators are also homing in on Kushner's role in
pushing Trump to fire former FBI Director James Comey in
May.

Special counsel Robert Mueller is turning up the heat on
President Donald Trump's son-in-law and senior adviser, Jared
Kushner, as he examines potential collusion between the Trump
campaign and Russia, and whether Trump obstructed justice when he
fired FBI Director James Comey in May.

Mueller's team has reportedly questioned witnesses about some of
Kushner's conversations and meetings with foreign leaders during
the transition, when he famously hosted former Russian ambassador
Sergei Kislyak at Trump Tower and asked whether it would be
possible to set up a backchannel line of communication to Moscow.

Kislyak then orchestrated a meeting between Kushner and the CEO
of Russia's Vnesheconombank, Sergei Gorkov, who was appointed by
Russian President Vladimir Putin in January 2016 as part of a
restructuring of the bank's management team, Bloomberg reported
last year.

The Kremlin and the White House have provided conflicting
explanations for why Kushner met with Gorkov. Reuters reported
earlier this year that the FBI is examining
whether Gorkov suggested to Kushner that Russian banks could
finance Trump associates' business ventures if US sanctions were
lifted or relaxed.

Federal investigators are also examining Kushner's role in
blocking a UN resolution that would have condemned Israel for
building settlements in disputed territories, according to
The Wall Street
Journal, and whether Kushner advised Trump to fire Comey last
spring. Kushner reportedly gave Mueller's team documents related
to Comey's firing earlier this month.

Four people told The Journal that Kushner "pushed" Trump to fire
the former FBI director in conversations with the president and
his top advisers. His lawyer, Abbe Lowell, downplayed Kushner's
involvement.

“When the president made the decision to fire FBI Director Comey,
Mr. Kushner supported it," Lowell said in a statement.

Kushner has come under heightened scrutiny since last week, when
the Senate Judiciary Committee said he forwarded emails about a
"Russian backdoor overture and dinner invite" to Trump campaign
officials and failed to produce those
emails to lawmakers investigating Russia's election
interference.

Additional emails that he failed to turn over, according to the
committee, involved communication with the anti-secrecy agency
WikiLeaks and with a Belarusian-American businessman named Sergei
Millian. Millian most recently headed a group called the
Russian-American Chamber of Commerce.

The Journal reported in September that members of Trump's legal
team wanted Kushner to resign from his position as a senior
adviser because of his controversial meetings with Russian
nationals during the election and his initial failure to disclose
them on his security clearance form.

Kushner has had to revise the form several times, at one point
adding more than 100 foreign contacts that he initially failed to
disclose. He still does not have a permanent security clearance,
which experts say is rare for a senior official who has been in
the White House for nearly a year.

They began pushing for his ouster when they became aware of
Kushner's attendance at a meeting organized by his brother-in-law
Donald Trump Jr. at Trump Tower last June with Russian lawyer
Natalia Veselnitskaya and Russian-American lobbyist Rinat
Akhmetshin. Kushner was the only one at the meeting who currently
holds a White House job.

One of Trump's main lawyers in the probe, John Dowd, told The
Journal that he "didn't agree" with some of his colleagues' view
that Kushner should resign.

"I thought it was absurd,” Dowd said. “I made my views known.”

In an 11-page statement
provided to the Senate Intelligence Committee in late July
detailing his Russian contacts during the campaign and transition
period, Kushner said he "did not recall" the meeting with
Veselnitskaya and Akhmetshin until he began "reviewing documents
and emails in response to congressional requests for
information."